Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended			6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended					3 Months Ended	6 Months Ended			1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Investment	Jun. 30, 2011	Jun. 30, 2012 Investment	Jun. 30, 2011	Dec. 31, 2011 Investment	Jun. 30, 2012 Minimum	Jun. 30, 2012 Maximum	Jun. 30, 2012 Employees Base Compensation Maximum	Jun. 30, 2012 Employees Incentive Pay Compensation Maximum	Jun. 30, 2012 Non Employee Directors Cash And Stock Director Fee Maximum	Jun. 30, 2012 Stock options	Jun. 30, 2011 Stock options	Jun. 30, 2012 Stock options	Jun. 30, 2011 Stock options	Jun. 30, 2012 Restricted stock units	Jun. 30, 2011 Restricted stock units	Jun. 30, 2012 Restricted stock units	Jun. 30, 2011 Restricted stock units	Dec. 31, 2011 Restricted stock units	Jun. 30, 2012 Restricted stock awards	Jun. 30, 2012 Restricted stock awards	Dec. 31, 2011 Restricted stock awards	Jun. 30, 2012 Restricted stock units and restricted stock awards	Jun. 30, 2011 Restricted stock units and restricted stock awards	Jun. 30, 2012 Restricted stock units and restricted stock awards	Jun. 30, 2011 Restricted stock units and restricted stock awards	Jun. 30, 2012 Fixed Rate Long Term Debt	Dec. 31, 2011 Fixed Rate Long Term Debt	Jun. 30, 2012 Sales and Lease Ownership	Jun. 30, 2011 Sales and Lease Ownership	Jun. 30, 2012 Sales and Lease Ownership	Jun. 30, 2011 Sales and Lease Ownership	Jun. 30, 2012 Sales and Lease Ownership Customer relationship intangibles Year	Jun. 30, 2012 Sales and Lease Ownership Non-compete intangibles	Jun. 30, 2012 Sales and Lease Ownership Acquired franchise development rights	Jun. 30, 2012 HomeSmart	Jun. 30, 2012 HomeSmart	Jun. 30, 2012 HomeSmart Customer relationship intangibles Year	Jun. 30, 2012 HomeSmart Non-compete intangibles	Oct. 14, 2011 Variable Interest Entity, Not Primary Beneficiary Store	Jun. 30, 2012 Variable Interest Entity, Not Primary Beneficiary	Jun. 30, 2012 Variable Interest Entity, Not Primary Beneficiary	Dec. 31, 2011 Variable Interest Entity, Not Primary Beneficiary	Jun. 30, 2012 Variable Interest Entity, Not Primary Beneficiary Maximum	Dec. 31, 2011 Variable Interest Entity, Not Primary Beneficiary Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Bonds maturity year						2012	2014
Number of bonds in unrealized loss position	36		36		38
Number of bonds	61		61		44
Certificates of deposit	$ 25,000,000		$ 25,000,000
Lease merchandise adjustments	12,500,000	10,400,000	23,500,000	19,900,000
Acquired goodwill assets on business combination																													10,600,000		10,600,000					476,000	476,000
Acquired intangible assets on business combination																																	1,200,000	830,000	578,000			103,000	51,000
Aggregate purchase price of acquisitions																													22,200,000		22,200,000					980,000	980,000
Estimated useful lives of intangibles																																	2					2
Amortization expense																													645,000	476,000	1,200,000	976,000				263,000	518,000
Compensation expense related to unvested stock option grants	412,000.0	607,000.0	837,000.0	1,200,000
Compensation expense related to restricted stock unit ("RSUs") awards and restricted stock awards ("RSAs")	798,000.0	751,000.0	1,400,000.0	1,200,000
Restricted stock granted															120,000		142,000		246,000			20,000
Restricted stock vested																			150,000			137,000
Options exercised	55,000		456,000		447,000
Aggregate number of shares of common stock that may be issued or transferred under the incentive stock awards plan	14,391,665		14,391,665
Percentage of deferred compensation arrangement								75.00%	100.00%	100.00%
Deferred compensation plan liability	7,800,000		7,800,000		6,300,000
Cash surrender value of company-owned life insurance ("COLI") contracts	7,100,000		7,100,000		5,800,000
Deferred compensation expense charged to operations	84,000	90,000	162,000	191,000
Deferred compensation benefits paid	565,000	27,000	565,000	27,000
Uncertain tax benefits that, if recognized, would affect the effective tax rate	1,200,000		1,200,000		1,200,000
Increase in weighted average shares outstanding assuming dilution											843,000.0	1,100,000	859,000.0	985,000.0	204,000	160,000	193,000	165,000		5,000	5,000
Anti-dilutive Securities excluded from the computation of earnings per share assuming dilution														293,000									11,000	6,000	9,000	6,000
Assets Held For Sale	12,368,000		12,368,000		9,885,000
Percentage of common stock outstanding																																								11.50%
Number of retail stores																																								47
Investment included in prepaid expenses and other assets																																												1,000	1,000
Held to maturity securities	131,758,000		131,758,000		98,132,000																																				17,000,000	17,000,000	15,900,000
Gains (losses) related to the investment																																									(321,000)	183,000
Maximum exposure to any potential losses associated with VIE																																									17,000,000	17,000,000
Assets held for sale, carrying value					10,400,000
Assets held for sale, fair value					9,900,000
Write-down from carrying value to fair value	600,000		600,000		453,000
Long term debt, carrying value																											137,000,000	137,000,000
Long term debt, fair value																											$ 139,537,000	$ 135,031,000